更改textView的布局重力

Question

I have a TextView in a ListView . I am trying to change the alignment of the textview according to the corresponding text. But it is not working.

Thanks

if (stringItem != null) {
        TextView messageText = (TextView) view.findViewById(R.id.list_item_text_view);

         if (mine==0)
             messageText.setGravity(Gravity.RIGHT);            

         if (mine==1)    
             messageText.setGravity(Gravity.LEFT);

     messageText.setText(stringItem);   
} 

and my Layout is as follow:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/list_item"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center_vertical"
android:orientation="vertical" >

<TextView
    android:id="@+id/list_item_text_view"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="5dp"
    android:layout_marginRight="10dp"
    android:layout_marginTop="10dp"
    android:layout_marginBottom="10dp"
    android:background="@drawable/self_textview"
    android:textSize="20sp" />
</LinearLayout>

* EDIT: * I know how to change it from the xml file, but how to change it from code ?

android:layout_gravity="right"

Answer 1

set the textview width to match_parent, Gravity sets how things are laid out INSIDE of the view, so if you set the textview's width to the list view items width and then set the gravity of the textview it will align the actual text there.

<?xml version="1.0" encoding="utf-8"?>

<TextView
    android:id="@+id/list_item_text_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginLeft="5dp"
    android:layout_marginRight="10dp"
    android:layout_marginTop="10dp"
    android:layout_marginBottom="10dp"
    android:background="@drawable/self_textview"
    android:textSize="20sp" />
</LinearLayout>

I also noticed you have the gravity set on the linear layout. I would not try to mix gravity and layout_gravity just stick to one. You might also get the desired effect by setting the gravity of the linear layout instead of the text view

Answer 2

I was able to make it work by changing the layoutParams of a linearlayout and changing its gravity then setting it to the textview .

LinearLayout.LayoutParams para=new LinearLayout.LayoutParams(
        LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT );
             para.gravity = Gravity.RIGHT;
             messageText.setLayoutParams(para);

will change the textview's gravity to right.